Slicing machine



SLICING MACHINE Filed Dec. 16, 1929 @mf-@Jn Patented Oct. 6, 1931v nrrsn VSTATES PATENT OFFICE WILLIAM J'. CAMPBELL, OF INDIANAPOLIS, INDIANA, ASSIGNOR TO AMERICAN SLICING- Y MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK SLICING MACHINE Application led December 16, 1929. Serial No. 414,265.

My invention relates to an improvement in slicing machines and has for one purpose the provision of an improved rotary knife. Another object is the provision of improved scraping means for a rotary knife. Another object is the provision of means for preventing fragments or portions of the material being sliced from penetrating within the housingof the slicing machine. Other objects will appear from time to time in the course of the specification and claims.

I illustrate my invention more or less diagrammatically in the accompanying drawings, wherein- Figure l is an elevation;

Figure 2 is a section on the line 2--2 of Figure l; and

Figure 3 is a section on the line 3-3 of Figure l.

Like parts are indicated by like symbols throughout the specification and drawings.

Referring to the drawings, A generally indicates any suitable slicing` machine base upon which may be mounted a motor not shown in detail but enclosed wit-hin the housing A1. A2 indicates the shaft of said motor, A3 a drive pulley thereon and A4 a belt passing about said drive pulley.

B generally indicates a rotary knife mounted in any suitable fashion upon the frame or base A. It may have a pulley B1 about which passes the belt A47 whereby rotation of the motor serves to rotate the knife. The knife is herein shown as forwardly recessed as at B2 and rearwardly recessed as at B3, the rear recess being of lesser diameter than the forward recess. The forward peripheral face B4 may be plane, or slightly dished or concave. The rear peripheral face generally indicated as B5 may be -generally arcuate in cross section7 terminating at its inner edge in the shoulder B6, which bounds the recess B3. The face between the shoulder B6 and the cutting edge is formed with a plurality of concentric annular depressions B7, separated by the upstanding ridges or walls BS. It will be observed that a portion of the frame indicated as A1o enters the rear recess B3 and approaches closely adjacent the shoulder B6.

Mounted upon the frame portion A10 I il- ,spirit of my invention.

lustrate a scraping or knife clearing or cleaning member generally indicated as C. This member C includes a portion C1 conforming generally to or overlying the frame portion A10, as shown in Figure 2. It may be secured to it as by the screw C2 passing through the slot C3 in the member C, whereby a certain measure. of adjustment is provided. One edge of the member C is provided with a plurality of fingers C4, each one of which penetrates one of the channels or grooves B7.

It will be realized that whereas I have described and shown a practical and operative device, nevenheless many changes might be made in the size, shape, number and disposition of parts without departing from the I therefore wish my description and drawings to be taken as in a broad sense illustrative and diagrammatic rather than as limiting me to my specific showing.

In particular it will be understood that I do not wish to be limited to the particular or specific arrangement or spacing or sha e of grooves or channels B7 or of lingers 34, as they may be varied widely without departing from the spirit of my invention.

In employing the term channel as descriptive of the knife, I wish this term to be interpreted as broadly enough to cover any circumferential irregularities of cont-our, concentricwith the aXis of rotation of the knife which serve to exercise the stopping or guarding function of the channels described and shown herein.

The use and operation of my invention are as follows:

In slicing machines of 'the type herein shown the problem of major importance is the prevention of access of material, such as scraps of meat, lard, grease and the like, into the interior of the slicing machine housing or frame. The penetration of such material creates unsanitary conditions and may also shorten the life of the driving belt. In the use of the device the knife is constantly rotated, at a high speed of rotation, and the work to be sliced is moved across the face and past the cutting edge of the knife, by any suitable means, the details of which are not' herein shown, since they do not of themselves form part of the present invention. It will be understood that as the Work passes across the cutting edge of the knife slices are cut from the Work and fall upon the Work receiving tray A12. Assuming that a greasy substance, such as ham or bacon is being cut, it may happen, owing to the high speed of rotation of the knife, that the material being cut is heated sufficiently to liquefy the grease or lard in it, which grease or lard may pass across the face of the knife. By employing a plurality of circumferential concentric channels I greatly reduce the tendency of this material to be wiped across the face of the knife by the slices as they are severed. The individual slots or grooves, and the raised port-ions of the knife between them, serve as Walls or dams to prevent the access of grease, meat juices and bits of material. In order to prevent the accumulation of material in these grooves I provide the scraping means shown, including the fingers C* which tend to scrape or ploiv out whatever material penetrates and adheres to the slots B7, and furthermore serve as a positive slice deflector.

Where in the description and claims I employ the terms slot or groove or channel I Wish to mean a depression in the knife bounded at each side by a Wall effectively deining one side of such groove, slot or channel.

I claim:

1. In a slicing machine, a rotary knife, having a plurality of concentric channels formed in a face thereof, and a scraper, op posed to said knife, and including portions adapted to penetrate said channels.

2. In a slicing machine, a rotary knife, the rear face of said knife having formed therein a plurality of concentric channels, and a scraper, opposed to the rear face of said knife, and including elements adapted to penetrate said channels.

In a slicing machine, a rotary knife h aving a face channeled concentrieally with the axis of rotation of said knife, and a scraper, opposed to said channeled face, and formed to penetrate the channeled portion thereof.

4. In a slicing machine, arotary knife having a channel formed in one face thereof, adjacent the cutting edge, said channel being concentric with the axis of rotation of the knife.

5. In a slicing machine, a rotary knife, the rear face of said knife being formed with a central depression, the portion of the rear face of said knife intermediate said central depression and the cutting edge being concentrically channeled.

6. In a slicing machine, a rotary knife, the rear face of said knife being formed with a central depression, the portion of the rea-r face of said knife intermediate said central the cutting edge being depression and plurality of concentric formed with a channels.

7. In a slicing machine, a rotary knife, the rear face of said knife being formed with a central depression, the portion of the rear face of said knife intermediate said central depression and the cutting edge being concentrically channeled, and a scraping member opposed to and penetrating said channeled portion of the knife face.

8. The structure of claim' 7 characterized by the employment of a guard member penetrating said central depression, the edge of said guard member being masked by the inner edge of the peripheral portion of the knife adjacent and exterior to said central depression.

9. In a slicing machine, a rotary knife, the rear face of said knife being formed with a central depression, a guard element, penetrating said central depression, the inner edge of the peripheral portion of said knife being adapted to mask the edge of said guard element, the peripheral exposed portion of the rear face of the knife being formed with channels concentric with the axis of rotation of the knife.

l0. The structure of claiml 9 characterized by the employmentof a scraping member opposed to and penetrating said channeled portion of the knife.

l1. The structure of claim 9 characterized by the employment of a scraping member opposed to the channeled portion of the knife and mounted upon the guard element.

l2. In a slicing machine, a rotary knife having a plurality of concentric channels formed in a face thereof, and a scraper, opposed to said knife, said scraper having a plurality of fingers adapted to penetrate the individual channels.

Signed at Indianapolis, county of Marion, and State of Indiana, this 19th day of November, 1929.

IVILLIAM J. CAMPBELL. 

